CVE-2026-33538
CVE-2026-33538 · Parse Server: Denial of service via unindexed database query for unconfigured auth providers
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.
CVSS 8.7 · High · EPSS 0.8% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
parse-server
- Versions
- < 8.6.58: Affected
- >= 9.0.0, < 9.6.0-alpha.52: Affected
No fix published
parse-server npm
- Affected ranges
- SEMVER: ≥ 9.0.0, < 9.6.0-alpha.52
Update to 9.6.0-alpha.52
parse-server npm
- Affected ranges
- SEMVER: < 8.6.58
Update to 8.6.58
Original sources
- https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr
- https://github.com/parse-community/parse-server/pull/10270
- https://github.com/parse-community/parse-server/pull/10271
- https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357
- https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54
- https://nvd.nist.gov/vuln/detail/CVE-2026-33538